Volume Bragg Gratings in PTR glass – New Optical Elements for Laser Design

Glebov, Leonid

doi:10.1364/assp.2008.md1

Cited by 13 publications

(12 citation statements)

References 23 publications

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“…51 When two holograms are written in a single piece of glass, the efficiency can still be higher than 98%. 52 Many layers of holographic glass can be placed back-toback with relatively low losses. For example, eight holograms in each direction, azimuth, and elevation could be used.…”

Section: Volume Holographic Gratingsmentioning

confidence: 99%

Progress and opportunities in the development of nonmechanical beam steering for electro-optical systems

McManamon¹,

Ataei²

2019

Opt. Eng.

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We discuss over three decades of progress in nonmechanical beam steering, provide a comparison of approaches being developed, and comment on promising approaches not yet fully developed. Most of the work in nonmechanical beam steering has been for narrowband optical systems, but a brief discussion is provided of broadband. The majority of the nonmechanical approaches to beam steering create a tilted optical path delay (OPD) to change the wavefront, but some directly create a phase delay. OPD-based approaches may be true time delay, with no resets or modulo 2πn optical phased arrays that have resets. Most of the nonmechanical optical beam steering approaches tilt an existing wavefront and are called space fed approaches, because the beam is already formed when the wavefront is tilted. For the majority of radar nonmechanical beam steering, the tilted wavefront is formed by individual transmit/receive modules. Periodic structures (gratings) spread different wavelengths of light in angle, thus steering light, and are also used for nonmechanical steering. Our paper is derived from a conference paper presented at Photonics West in February 2019.

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Section: Volume Holographic Gratingsmentioning

confidence: 99%

Progress and opportunities in the development of nonmechanical beam steering for electro-optical systems

McManamon¹,

Ataei²

2019

Opt. Eng.

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“…By comparing with a planar grating, VBGs have many advantages in linewidth narrowing: low loss in power output, compact structure, high damage threshold, good wavelength stability, etc. Such excellent performances enable VBGs useful elements in reconstruction of laser resonators 9,10 . In particular, VBG-LDs have been selected as the satisfactory pump sources with narrow linewidths of diode pumped alkali lasers (DPALs) [11][12][13][14][15][16][17][18] .…”

Section: Introductionmentioning

confidence: 98%

Theoretical investigation of diffraction features of a planar wave using a Reflecting Volume-Bragg-Grating (RVBG)

Xue¹,

Wang²,

Zhang³

et al. 2015

SPIE Proceedings

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A theoretical procedure has been developed for evaluation of the diffraction efficiency of a Reflecting Volume-Bragg-Grating (RVBG) in accordance with Kogelnik's theory. The diffraction features have been investigated for the different grating thicknesses, refractive index modulation, and grating spatial frequencies, respectively. The linewidths of a diffracted light and the effective diffraction efficiency have been studied while a certain linewidth in spectrum of an incident LD beam is taken into account in the calculation. The results are thought to be useful in the applications of single-longitudinal-mode (SLM) lasers and linewidth narrowing by means of RVBGs.

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“…Photosensitive fibers made out of PTR glass have also been reported [21]. These elements are used for a wide range of applications [22][23][24]. Thanks to their high angular selectivity [25], transmitting Bragg gratings have been thoroughly used for the selection of transverse mode and phase locking of multimode lasers [26,27].…”

Section: Introductionmentioning

confidence: 99%

A review of the photo-thermal mechanism and crystallization of photo-thermo-refractive (PTR) glass

Lumeau

Zanotto

2016

International Materials Reviews

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International audiencePhoto-thermo-refractive (PTR) glass is an optically transparent photosensitive multicomponent silicate glass. UV-exposure produces silver nanoclusters, and NaF nanocrystals upon heating, giving rise to permanent refractive index changes. This is the basis for the production ofBragg gratings. In this article, we present a comprehensive overview of the photo-thermoinduced effects in PTR glass. We first give a general introduction of PTR glasses and their applications. Then, we perform a thorough analysis of the mechanisms of refractive index changes starting with the photo-induced process followed by the crystal nucleation mechanism and NaF crystallisation kinetics. Finally, we concentrate on the PTR glassnanostructure and its effect on the crystallisation mechanisms and properties, finishing with the kinetics and origin of the refractive index change. Despite the fact that much is known about this septuagenarian glass and that it is already being commercially produced, a number of open problems still exist that warrant further investigation

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Volume Bragg Gratings in PTR glass – New Optical Elements for Laser Design

Abstract: This is a survey of achievements in semiconductor, solid state and fiber lasers enabled by the use of new optical elements which are volume Bragg gratings recorded in a photo-thermorefractive (PTR) glass.

Cited by 13 publications

References 23 publications

Progress and opportunities in the development of nonmechanical beam steering for electro-optical systems

Progress and opportunities in the development of nonmechanical beam steering for electro-optical systems

Theoretical investigation of diffraction features of a planar wave using a Reflecting Volume-Bragg-Grating (RVBG)

A review of the photo-thermal mechanism and crystallization of photo-thermo-refractive (PTR) glass

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